[javascript] Getting scroll bar width using JavaScript

 function getScrollbarWidth() { 
    var div = $('<div style="width:50px;height:50px;overflow:hidden;position:absolute;top:-200px;left:-200px;"><div style="height:100px;"></div>'); 
    $('body').append(div); 
    var w1 = $('div', div).innerWidth(); 
    div.css('overflow-y', 'scroll'); 
    var w2 = $('div', div).innerWidth(); 
    $(div).remove(); 
    return (w1 - w2); 
}

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